Jarno Trulli says he is concerned that the banning of electronic aids has returned the spectre of cheating to formula one. Toyota's Italian driver is quoted as telling the magazine Autosprint that, eight weeks before the opening race of 2008, some rival teams may have found a way around the new standard electronics developed and supplied by McLaren Electronic Systems.

He suspects that some teams are already using illegal forms of launch and traction control in pre-season testing.

"I'm not saying someone's cheating, even though we've received some conflicting information at Toyota," Trulli, 33, said.

"But having analysed the behaviour on the track both now and in the tests in December, the changes between them are many -- and in several cases suspicious," he added. (GMM)